Troubleshooting Waits for 'SQL*Net message to client' and 'SQL*Net more data to client' Events from a Performance Perspective
(Doc ID 1404526.1)
Last updated on JANUARY 22, 2025
Applies to:
Oracle Net Services - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]Oracle Net Services - Version 11.2.0.3 to 11.2.0.3 [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Purpose
The purpose of the note is to assist troubleshoot waits for 'SQL*Net message to client' and 'SQL*Net more data to client' events.
NOTE: These waits are not Oracle's wait, but normally idle wait event or network wait. This note is informational only and should not be considered an Oracle wait event.
Troubleshooting Steps
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In this Document
| Purpose |
| Troubleshooting Steps |
| What are the 'SQL*Net message to client' and 'SQL*Net more data to client' events? |
| How to Diagnose Waits for the 'SQL*Net message to client' and 'SQL*Net more data to client' events |
| Potential Solutions |
| 1. SDU size |
| 2. Arraysize |
| 3. TCP |
| Community Discussions |
| References |